<template>
  <div class="upload-file">
    <el-upload
      v-show="fileList.length < limit"
      :action="uploadFileUrl"
      :before-upload="handleBeforeUpload"
      :file-list="fileList"
      :limit="limit"
      :accept="accept"
      :on-error="handleUploadError"
      :on-exceed="handleExceed"
      :on-success="handleUploadSuccess"
      :show-file-list="false"
      :headers="headers"
      class="upload-file-uploader"
      ref="upload"
      v-if="!isOnlyShow"
    >
      <!-- 上传按钮 -->
      <el-button size="mini" type="primary">选取文件 ( {{ fileType.join('/') }} )</el-button>
      <!-- 上传提示 -->
      <div class="el-upload__tip" slot="tip" v-if="showTip">
        请上传
        <!--        <template v-if="fileSize"> 大小不超过 <b style="color: #f56c6c">{{ fileSize }}MB</b> </template>-->
        <template v-if="fileType">
          格式为
          <b style="color: #f56c6c">{{ fileType.join('/') }}</b>
        </template>
        的文件
      </div>
    </el-upload>

    <!-- 文件列表 -->
    <transition-group class="upload-file-list el-upload-list el-upload-list--text" name="el-fade-in-linear" tag="ul">
      <li
        :style="{ width: isOnlyShow ? '100px' : '' }"
        :key="file.uid"
        class="ele-upload-list__item-content"
        v-for="(file, index) in fileList"
      >
        <!--        <el-link :href="file.url" :underline="false" target="_blank">-->
        <!--          &lt;!&ndash;          {{ getFileName(file.name) }}&ndash;&gt;-->
        <!--          <span class="el-icon-document">  查看 </span>-->
        <!--        </el-link>-->
        <!--        <div class="ele-upload-list__item-content-action" v-if="!isOnlyShow">-->
        <!--          <el-link :underline="false" @click="handleDelete(index)" type="danger">删除</el-link>-->
        <!--        </div>-->
        <a :href="fileUrl + file.url" target="_blank" style="margin-right: 10px">
          <el-button type="primary" size="mini" icon="el-icon-search">查看</el-button>
        </a>
        <el-button type="danger" size="mini" icon="el-icon-delete" @click="handleDelete(index)" v-if="!isOnlyShow">
          删除
        </el-button>
      </li>
    </transition-group>
  </div>
</template>

<script>
import { getToken } from '@/utils/auth';

export default {
  name: 'FileUpload',
  props: {
    // 值
    value: [String, Object, Array],
    //
    isOnlyShow: {
      type: Boolean,
      default: false,
    },
    pages: {
      type: String,
      default: 'no',
    },
    // 数量限制
    limit: {
      type: Number,
      default: 1,
    },
    // 大小限制(MB)
    fileSize: {
      type: Number,
      default: 5,
    },
    // 文件类型, 例如['png', 'jpg', 'jpeg']
    fileType: {
      type: Array,
      default: () => ['pdf'],
    },
    // 是否显示提示
    isShowTip: {
      type: Boolean,
      default: false,
    },
  },
  mounted() {
    // this.fileList = []
    if (window.__POWERED_BY_QIANKUN__) {
      if (this.pages == 'dayImport') {
        this.uploadFileUrl = 'http://192.168.10.227:29266/day/importHoliday';
      } else {
        this.uploadFileUrl =
          (process.env.NODE_ENV === 'development' ? '/dev-api' : '/prod-api') + '/iot/giveoutCardRecord/upload';
      }
    } else {
      if (this.pages == 'dayImport') {
        this.uploadFileUrl = 'http://192.168.10.227:29266/day/importHoliday';
      }
    }
    console.log('文件地址');
    console.log(this.uploadFileUrl);
    console.log(this.pages);
  },
  data() {
    return {
      fileUrl: window.location.origin,
      // uploadFileUrl: (process.env.NODE_ENV === "development" ? '/dev-api' : '/prod-api') + "/iot/giveoutCardRecord/upload", // 上传的图片服务器地址

      uploadFileUrl: '',
      // (process.env.NODE_ENV === "development" ? '/dev-api' : '/prod-api') + "/iot/giveoutCardRecord/upload", // 上传的图片服务器地址
      headers: {
        Authorization: 'Bearer ' + getToken(),
      },
      fileList: [],
    };
  },
  watch: {
    value: {
      handler(val) {
        if (val) {
          let temp = 1;
          // 首先将值转为数组
          const list = Array.isArray(val) ? val : this.value.split(',');
          // 然后将数组转为对象数组
          this.fileList = list.map(item => {
            if (typeof item === 'string') {
              item = { name: item, url: item };
            }
            item.uid = item.uid || new Date().getTime() + temp++;
            return item;
          });
        } else {
          this.fileList = [];
          return [];
        }
      },
      deep: true,
      immediate: true,
    },
  },
  computed: {
    // 是否显示提示
    showTip() {
      return this.isShowTip && (this.fileType || this.fileSize);
    },
    accept() {
      let list = [];
      this.fileType.map(f => {
        list.push('.' + f);
      });
      return list.join(',');
    },
  },

  methods: {
    // 上传前校检格式和大小
    handleBeforeUpload(file) {
      // 校检文件类型
      if (this.fileType) {
        let fileExtension = '';
        if (file.name.lastIndexOf('.') > -1) {
          fileExtension = file.name.slice(file.name.lastIndexOf('.') + 1);
        }
        const isTypeOk = this.fileType.some(type => {
          if (file.type.indexOf(type) > -1) return true;
          if (fileExtension && fileExtension.indexOf(type) > -1) return true;
          return false;
        });
        if (!isTypeOk) {
          this.$message.error(`文件格式不正确, 请上传${this.fileType.join('/')}格式文件!`);
          return false;
        }
      }
      // 校检文件大小
      if (this.fileSize) {
        const isLt = file.size / 1024 / 1024 < this.fileSize;
        if (!isLt) {
          this.$message.error(`上传文件大小不能超过 ${this.fileSize} MB!`);
          return false;
        }
      }
      return true;
    },
    // 文件个数超出
    handleExceed() {
      this.$message.error(`上传文件数量不能超过 ${this.limit} 个!`);
    },
    // 上传失败
    handleUploadError(err) {
      this.$message.error('上传失败, 请重试');
    },
    // 上传成功回调
    handleUploadSuccess(res, file) {
      if (res.code == 200) {
        this.$message.success('上传成功');
        this.fileList.push({ name: res.data.url, url: res.data.url });
        this.$emit('input', this.listToString(this.fileList));
      } else {
        this.$message.error(res.msg);
      }
    },
    // 删除文件
    handleDelete(index) {
      this.fileList.splice(index, 1);
      this.$emit('input', this.listToString(this.fileList));
    },
    // 获取文件名称
    getFileName(name) {
      if (name.lastIndexOf('/') > -1) {
        return name.slice(name.lastIndexOf('/') + 1).toLowerCase();
      } else {
        return '';
      }
    },
    // 对象转成指定字符串分隔
    listToString(list, separator) {
      let strs = '';
      separator = separator || ',';
      for (let i in list) {
        strs += list[i].url + separator;
      }
      return strs != '' ? strs.substr(0, strs.length - 1) : '';
    },
  },
};
</script>

<style scoped lang="scss">
.upload-file-uploader {
  margin-bottom: 5px;
}

.upload-file-list .el-upload-list__item {
  border: 1px solid #e4e7ed;
  line-height: 2;
  margin-bottom: 10px;
  position: relative;
}

.upload-file-list .ele-upload-list__item-content {
  display: flex;
  align-items: center;
  justify-content: unset;
  color: inherit;
  height: 40px;
}

.ele-upload-list__item-content-action .el-link {
  margin-right: 10px;
}
// .fileBtn {
// }
</style>
